The 8+ isomer in 78Zn and the doubly magic character of 78Ni

J. M. Daugas; R. Grzywacz; M. Lewitowicz; L. Achouri; J. C. Angélique; D. Baiborodin; K. Bennaceur; R. Bentida; R. Béraud; C. Borcea; C. Bingham; W. N. Catford; A. Emsallem; G. De France; H. Grawe; K. L. Jones; R. C. Lemmon; M. J. Lopez Jimenez; F. Nowacki; F. De Oliveira Santos; M. Pfützner; P. H. Regan; K. Rykaczewski; J. E. Sauvestre; M. Sawicka; G. Sletten; M. Stanoiu

doi:10.1016/S0370-2693(00)00177-5

The 8⁺ isomer in ⁷⁸Zn and the doubly magic character of ⁷⁸Ni

J. M. Daugas
, R. Grzywacz
, M. Lewitowicz
, L. Achouri
, J. C. Angélique
, D. Baiborodin
, K. Bennaceur
, R. Bentida
, R. Béraud
, C. Borcea
, C. Bingham
, W. N. Catford
, A. Emsallem
, G. De France
, H. Grawe
, K. L. Jones
, R. C. Lemmon
, M. J. Lopez Jimenez
, F. Nowacki
, F. De Oliveira Santos

M. Pfützner, P. H. Regan, K. Rykaczewski, J. E. Sauvestre, M. Sawicka, G. Sletten, M. Stanoiu

Research output: Contribution to journal › Article › peer-review

66 Scopus citations

Abstract

A new isomeric state in ⁷⁸Zn has been identified and studied in the fragmentation of a 60.5 AMeV ⁸⁶Kr beam on a (nat)Ni target. The measured energies of the transitions and the half-Life, T(1/2) = 319(9) ns, of the isomeric decay suggest a spin and parity assignment I(π) = 8⁺. The deduced B(E2,8⁺ → 6⁺) value equals 1.21(5) W.u. is well reproduced in large scale shell model calculations using realistic interactions in the proton-Neutron 2p(3/2), 1f(5/2), 2p(1/2), 1g(9/2) model space. Standard E2 polarisation charges of 0.5e for both protons and neutrons were used. This result consists the first experimental evidence of the persistance of the N = 50 shell gap in the vicinity of ₂₈/⁷⁸Ni₅₀. (C) 2000 Elsevier Science B.V.

Original language	English
Pages (from-to)	213-218
Number of pages	6
Journal	Physics Letters B
Volume	476
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(00)00177-5
State	Published - Mar 16 2000

Funding

We are grateful to the technical support provided to us by staff of the GANIL facility. This work has been partially supported by the POLONIUM project N.98275, KBN grant N.2P03B03615, DOE contract DE-AC05-96OR22464, Alliance grant N.98029 between University of Surrey and GANIL and by EPSRC(UK).

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10.1016/S0370-2693(00)00177-5

Cite this

Daugas, J. M., Grzywacz, R., Lewitowicz, M., Achouri, L., Angélique, J. C., Baiborodin, D., Bennaceur, K., Bentida, R., Béraud, R., Borcea, C., Bingham, C., Catford, W. N., Emsallem, A., De France, G., Grawe, H., Jones, K. L., Lemmon, R. C., Lopez Jimenez, M. J., Nowacki, F., ... Stanoiu, M. (2000). The 8⁺ isomer in ⁷⁸Zn and the doubly magic character of ⁷⁸Ni. Physics Letters B, 476(3-4), 213-218. https://doi.org/10.1016/S0370-2693(00)00177-5

@article{60065fd9e3f24dc6a241c11f156c35e2,

title = "The 8+ isomer in 78Zn and the doubly magic character of 78Ni",

abstract = "A new isomeric state in 78Zn has been identified and studied in the fragmentation of a 60.5 AMeV 86Kr beam on a (nat)Ni target. The measured energies of the transitions and the half-Life, T(1/2) = 319(9) ns, of the isomeric decay suggest a spin and parity assignment I(π) = 8+. The deduced B(E2,8+ → 6+) value equals 1.21(5) W.u. is well reproduced in large scale shell model calculations using realistic interactions in the proton-Neutron 2p(3/2), 1f(5/2), 2p(1/2), 1g(9/2) model space. Standard E2 polarisation charges of 0.5e for both protons and neutrons were used. This result consists the first experimental evidence of the persistance of the N = 50 shell gap in the vicinity of 28/78Ni50. (C) 2000 Elsevier Science B.V.",

author = "Daugas, \{J. M.\} and R. Grzywacz and M. Lewitowicz and L. Achouri and Ang{\'e}lique, \{J. C.\} and D. Baiborodin and K. Bennaceur and R. Bentida and R. B{\'e}raud and C. Borcea and C. Bingham and Catford, \{W. N.\} and A. Emsallem and \{De France\}, G. and H. Grawe and Jones, \{K. L.\} and Lemmon, \{R. C.\} and \{Lopez Jimenez\}, \{M. J.\} and F. Nowacki and \{De Oliveira Santos\}, F. and M. Pf{\"u}tzner and Regan, \{P. H.\} and K. Rykaczewski and Sauvestre, \{J. E.\} and M. Sawicka and G. Sletten and M. Stanoiu",

year = "2000",

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doi = "10.1016/S0370-2693(00)00177-5",

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volume = "476",

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Daugas, JM, Grzywacz, R, Lewitowicz, M, Achouri, L, Angélique, JC, Baiborodin, D, Bennaceur, K, Bentida, R, Béraud, R, Borcea, C, Bingham, C, Catford, WN, Emsallem, A, De France, G, Grawe, H, Jones, KL, Lemmon, RC, Lopez Jimenez, MJ, Nowacki, F, De Oliveira Santos, F, Pfützner, M, Regan, PH, Rykaczewski, K, Sauvestre, JE, Sawicka, M, Sletten, G & Stanoiu, M 2000, 'The 8⁺ isomer in ⁷⁸Zn and the doubly magic character of ⁷⁸Ni', Physics Letters B, vol. 476, no. 3-4, pp. 213-218. https://doi.org/10.1016/S0370-2693(00)00177-5

TY - JOUR

T1 - The 8+ isomer in 78Zn and the doubly magic character of 78Ni

AU - Daugas, J. M.

AU - Grzywacz, R.

AU - Lewitowicz, M.

AU - Achouri, L.

AU - Angélique, J. C.

AU - Baiborodin, D.

AU - Bennaceur, K.

AU - Bentida, R.

AU - Béraud, R.

AU - Borcea, C.

AU - Bingham, C.

AU - Catford, W. N.

AU - Emsallem, A.

AU - De France, G.

AU - Grawe, H.

AU - Jones, K. L.

AU - Lemmon, R. C.

AU - Lopez Jimenez, M. J.

AU - Nowacki, F.

AU - De Oliveira Santos, F.

AU - Pfützner, M.

AU - Regan, P. H.

AU - Rykaczewski, K.

AU - Sauvestre, J. E.

AU - Sawicka, M.

AU - Sletten, G.

AU - Stanoiu, M.

PY - 2000/3/16

Y1 - 2000/3/16

N2 - A new isomeric state in 78Zn has been identified and studied in the fragmentation of a 60.5 AMeV 86Kr beam on a (nat)Ni target. The measured energies of the transitions and the half-Life, T(1/2) = 319(9) ns, of the isomeric decay suggest a spin and parity assignment I(π) = 8+. The deduced B(E2,8+ → 6+) value equals 1.21(5) W.u. is well reproduced in large scale shell model calculations using realistic interactions in the proton-Neutron 2p(3/2), 1f(5/2), 2p(1/2), 1g(9/2) model space. Standard E2 polarisation charges of 0.5e for both protons and neutrons were used. This result consists the first experimental evidence of the persistance of the N = 50 shell gap in the vicinity of 28/78Ni50. (C) 2000 Elsevier Science B.V.

AB - A new isomeric state in 78Zn has been identified and studied in the fragmentation of a 60.5 AMeV 86Kr beam on a (nat)Ni target. The measured energies of the transitions and the half-Life, T(1/2) = 319(9) ns, of the isomeric decay suggest a spin and parity assignment I(π) = 8+. The deduced B(E2,8+ → 6+) value equals 1.21(5) W.u. is well reproduced in large scale shell model calculations using realistic interactions in the proton-Neutron 2p(3/2), 1f(5/2), 2p(1/2), 1g(9/2) model space. Standard E2 polarisation charges of 0.5e for both protons and neutrons were used. This result consists the first experimental evidence of the persistance of the N = 50 shell gap in the vicinity of 28/78Ni50. (C) 2000 Elsevier Science B.V.

UR - https://www.scopus.com/pages/publications/0034673493

U2 - 10.1016/S0370-2693(00)00177-5

DO - 10.1016/S0370-2693(00)00177-5

M3 - Article

AN - SCOPUS:0034673493

SN - 0370-2693

VL - 476

SP - 213

EP - 218

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4